samsung ue55mu6192u dead signal LED

[giova96]

Greetings
sorry for my English
i have this samsung ue55mu6192u
standby light missing, I disassembled and checked the boards, the power board seems to work with the backlight turning on and the presence of 12.8v
reconnecting the main I notice that the 12.8v drop to 8.8v, but I don't notice any components on the main that heat up, everything is cold
I also noticed that I have a vacuum on the power board connector
on/off 4.5v
pwmblue 3.1v
poweron 4.5v
ana dim 3.2v

and when i connect them to main they all go down to 0
I've read that this series has eeprom problems and shows the same symptoms (I don't know if there is a voltage drop in that case too)

could it be an eeprom problem?
where can i find the firmware?
BN41-02568
IC1604 Winbond 25q40clsip

[lotas]

Re: samsung ue55mu6192u dead signal LED

Post your dump here, I'll fix it if it's a problem.

[giova96]

Re: samsung ue55mu6192u dead signal LED

Post your dump here, I'll fix it if it's a problem.

this is what i managed to recover
It's the first time I've done these things, I'm not very practical
Thank you

[lotas]

Re: samsung ue55mu6192u dead signal LED

Try, do not forget to install and write down the Status Register (0x88, 0x42) after recording.

[giova96]

Re: samsung ue55mu6192u dead signal LED

Try, do not forget to install and write down the Status Register (0x88, 0x42) after recording.

Status Register?
In what sense? I did not understand
I don't have much practice

[kevvort]

Re: samsung ue55mu6192u dead signal LED

Hi Giova, which program have you used for taking the dump?

If you're using asprogrammer see the screenshot in attachment.
Press the button on the side of the lock, show registers and then set the checkboxes for having 88 and 42 in the status registers.


p.s: sono ita anche io, ciao!

[giova96]

Re: samsung ue55mu6192u dead signal LED

program CH341A and an economic programmer

p.s ciao

[kevvort]

Re: samsung ue55mu6192u dead signal LED

See my edited message above
Basically you should find a form whre you can edit status register 1 and 2.
If you can't find it in your program maybe you can try using "asprogrammer"

[lotas]

Re: samsung ue55mu6192u dead signal LED

Try

[giova96]

Re: samsung ue55mu6192u dead signal LED

done (maybe )
i will go to try now

[kevvort]

Re: samsung ue55mu6192u dead signal LED

done (maybe )
i will go to try now

Looks fine and good luck!
Just a question based on your screenshot: why do you have W25Q80 instead of W25Q40 in your device type?

[giova96]

Re: samsung ue55mu6192u dead signal LED

Looks fine and good luck!
Just a question based on your screenshot: why do you have W25Q80 instead of W25Q40 in your device type?

in original device it is W25Q40 but i did not find it available
on the market I found the W25Q80
shouldn't change anything right?

[lotas]

Re: samsung ue55mu6192u dead signal LED

in original device it is W25Q40 but i did not find it available
on the market I found the W25Q80
shouldn't change anything right?

And why change it to 25Q80, write it down in your native 25Q40.

[giova96]

Re: samsung ue55mu6192u dead signal LED

And why change it to 25Q80, write it down in your native 25Q40.

because i thought it was broken initially, so i bought it new

I will try to write the original

[lotas]

Re: samsung ue55mu6192u dead signal LED

because i thought it was broken initially, so i bought it new

I will try to write the original

So you read the dump from it (from your native 25Q40), which you posted in the 3rd post?

[giova96]

Re: samsung ue55mu6192u dead signal LED

So you read the dump from it (from your native 25Q40), which you posted in the 3rd post?

yes

[lotas]

Re: samsung ue55mu6192u dead signal LED

yes

Ok.

[giova96]

Re: samsung ue55mu6192u dead signal LED

Ok.

it does not work
when the TV is unplugged for a long time I see a red flash and then turn off immediately
I noticed that on the IC I don't have the 3.3v
the 5v yes
before knowing this forum I had made another attempt but I got the wrong firmware, I had found the 50" on the net and I had missed that my 55"
with that newly installed firmware I had the red LED, but the TV didn't start and after a few attempts the LED didn't light up anymore
I probably broke something with the old firmware?

[Davi.p]

Re: samsung ue55mu6192u dead signal LED

when reprogramming memories one must always make a backup of old fw, now if you have that you must provide it to Lotas

[lotas]

Re: samsung ue55mu6192u dead signal LED

You erased your old firmware and wrote a firmware from "50" diagonal to it, it didn't work for you and you already made a backup with another firmware from "50", before manipulating firmware, you always need to make backups of old dumps. On this chassis, the diagonal does not play a role, the main thing here is that the SPI and eMMC software versions match.